/*
 * Copyright (c) JoinQuant Development Team
 * Author: Huayong Kuang <kuanghuayong@joinquant.com>
 */

#include <iostream>

using namespace std;

int main(void)
{
    int a = 0;
    do {
        cout << a << endl;
        a++;
    } while (a <= 3);

    return 0;
}

